import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class code1_2 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        double x = in.nextDouble() - 1.0;
        String b = in.next();

        int sum = 20;

        sum += Math.ceil(x);

        if (b.equals("y")) {
            sum += 5;
        }

        System.out.println(sum);
    }
}